[TechAssist] Re: Sony kv27ts32 SMPS kit installed,replaced 2SC4927v.hot
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 05 Sep 2003 16:49:01 -0400
Well,I decided to try several different HOTs and one ran fairly cool.
The Sony tech said there may be gain differences from one to another and
this alone can cause heat.(assuming no other defects of course).
So, it's up and running fairly cool.
Phil Bader
Gemini Computer & TV wrote:
>
> Yes I do know. Those resistors are for certain model 27, 29, and 32" sets in
> the ANU-1 and ANU-1A chassis (18 different models involved, either XBR or
> HSR series) that initially used a 2SD1941 horizontal output transistor. Sony
> came out with a service bulletin #161R2 back in December 1994 that stated
> that when replacing the original 2SD1941, to use the 2SC4927 instead.
> However, by using the 2SC4927 as a replacement in these sets, you would need
> to replace the biasing resistor (ref# R523) with one of a different value.
> The 27" and 29" sets use the 0.68 ohm while the 32" sets use the 0.33 ohm.
> Therefore those resistors do not apply to your set. I do have that bulletin
> in PDF and I will upload it to the members area.
>
> Bob Waterman, CET® #RI-28
> Master Technician License #9109
> Service Manager / Parts Manager
> Gemini Computer, TV, & Security Alarms
> (508)695-7302
> (508)695-7769 FAX
> geminitv@xxxxxxxxxxxxxxxx
> geminitv@xxxxxxx
> www.geminicomputertvsecurityalarms.com
>
> ----- Original Message -----
> From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, September 05, 2003 2:41 PM
> Subject: [TechAssist] Re: Sony kv27ts32 SMPS kit installed,replaced 2SC4927
> v.hot
>
> > I ordered an HOT and a sub came up on the distributor's site: Use "Kit"
> > #T99856641.
> > I got it.
> > Has a HOT (C4927) and two resistors (.33 and .68 ohm 1/2w) Nice of Sony
> > to give a kit and NO instructions what the heck to do with two
> > resistors!
> > Geez, any one know???
> > Phil Bader
> >
> > Jorge Camboni wrote:
> > >
> > > 2SC4927 is not the best choice, it ALWAYS runs hot on those sets
> > > Too many better subs to list.
> > > Even old slow D1556 works better, if you want a premium sub transistor
> > > try 2SD2578/80 . Usual replacement: 2SD1880/81
> > > I usually add a piece of aluminium stock to the heatsink.
> > > Have had 0 returns so far.
> > > Jorge
> > >
> > > At 04:54 p.m. 04/09/03 -0400, you wrote:
> > > >Had a shorted HOT 2SC4927 and the SMPS transistors
> > > >Q601,602,resistors,etc.
> > > >Installed an SMPS kit (OEM-Q601,602, 3 VDRs, 2 resistors). and an OEM
> > > >2SC4927 HOT. Powers up,plays good, but I think the new HOT runs hot.
> > > >What other parts are usually responsible for this?
> > > >Phil Bader
> > > >--
> > > >Philip Bader
> > > >Jan Phyl TV Inc. (estab. 1976)
> > > >3420 Recker Hwy. Winter Haven, Fl. 33880
> > > >Fax (863) 299-8821
> > > >email: tjanphyl@xxxxxxxxxxxxxxx
> > > >For Professional Technicians Only
> > > >
> > >
> >***************************************************************************
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> > >
> > > Jorge Camboni, GY Electronics, Richardson, TX
> > >
> > >
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> > --
> > Philip Bader
> > Jan Phyl TV Inc. (estab. 1976)
> > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > Fax (863) 299-8821
> > email: tjanphyl@xxxxxxxxxxxxxxx
> > For Professional Technicians Only
> >
> >
> ****************************************************************************
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--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
For Professional Technicians Only
*****************************************************************************
Classifieds! Buy or Sell!
http://sell.tech-assist.org
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